1. Consider the following reaction at 873K :

1) Calculate the standard 6ee energy change of reaction ( AGyO ) at 873K. The following data are given : AG?,so, = -361,670 + 72.683,J AG;,sq = -457,900 + 163.34T,J

2) Calculate the equilibrium constant K of the reaction at 873K.

3) A gas mixture includes SO2, SO3 and Oz. Partial pressures of these species are given in the following : Pso, = O.Olatm, Pso, = 0. latm, PO, = O.2latm. Calculate the activity quotient Q.

4) Calculate the free energy change of the reaction, AG,.

5) Is this reaction spontaneous from left to right as written under the conditions

6) If the partial pressures are changed as indicated below, calculate the free energy Pso, = O.Olatm, Pso, = 0. latm, PO, = 0.2latm. given above? change of the reaction:

7) Is this reaction spontaneous from left to right as written?

8) Calculate the partial pressure of SO3 which would be in equilibrium at 873K Pso, = O.Olatm, PO, = 0.2latm